Pattern for gates and runners in sand molds



(No Model.) I

S. J .ADAMS. 'PATTERN FOR GATES AND EUNNERS IN SAND MOLDS.

-Patented June 30, 1891.

UNITED STATES PATE T NICE,

STEPHEN JARVIS ADAMS, OF PITTSBURG, PENNSYLVANIA.

PATTERN FOR GATES AND RUN'NERS IN .SAND MOLDS.

SPECIFICATION formingpart of Letters Patent No. 455,14.6, dated June O,1891.

Application filed March 2, 1891. Serial No. 383.371. (No model.)

gate to the mold-cavity, such runner will be formed without requiringany attention from the molder after the mold is forned, the sand beingpacked around the runnerpattern in the ordinary molding operation andthe runner-pattern being'withdrawn with the gatepattern or mold-pattern,so leaving the proper connection formed between the gate and mold.

To this encl my invention consists, generally stated, in the combinationin patterns for forming castings, of two patterns, which are wellillustrated in a main pattern' and a gate-pattern, and a runner-patternhinged to one pattern and extending to the other pattern, and adapted toSwing on its hinge or hearing and be withdrawn with the pattern to whichit is connected, it being only necessary in forming molds by suchmolding apparatus to arrange the runner-pattern between the two patternswhen the patterns are inserted within the fiask,the sand being thenpacked around the patterns, and when they are withdrawn from thefinished mold the runner-pattern swinging away from the pattern to whichit is not connected and drawing out of the mold with the pattern withwhich it is connected, leaving the finished runner connecting the gateand mold-cavity or two mold-cavities.

To enable others skilled in the art, to make and use my invention, Iwill describe the same more fully, referring to the accompanyingdrawings, in which V Figure l is a sectional View illustrating one formin which my invention can be employed. Figs. 2 and 3 are like viewsillustrating other forms embodying ny invention. Fg. 4 is a View of anold ready for casting formed by the apparatus of Fig. 1; and Figs. 5,6, and 7 are detail views ot' the preferred forms of c and extend upwithin the flask d, while the runner-patterns e extend from the mainpatterns to the gate patterns, the runner-patterns being connected tothe top of each main pattern by a hinge-joint, as atf. Eachrunner-pattern is preferabl y curved, as illustrated in Figs. l and 2,as it will be withdrawn more easily; but it should not be of greatercurvature than will permit it to pass through the cavity made by themain pattern without hearing against the walls thereof, and the free endof the runner-pattern is preferably seated in a seat g, formed at theupper end of the gate-pattern b, as shown. The runner-patterns inayinsome cases be straight. In' Fig. 2 practically the same Construction isshown, except that the runner-patterns c are hinged to the gate-patternb and extend over to the main patterns a,such construction,of course,practically requiring that there shall be but two molds formed withinthe fiask. ends of the runner-patterns are seated in main patterns, asat g.

In Fig. 3 is shown another form embodying my invention, in which thegat-e-pattern b extends down from the top ot' the` fiask, while the mainpatterns eXtend up within the flask and the runner-patterns e are hingedthe lower end of the main patterns and swing in toward the lower end ofthe gate-pattern, bearing against the same or entering seats therein, asshown. This last-described nolding appathe ratns is preferably for theformation of wagonboxes, and. the runner patterns 'shown are adapted atthe same time to form th'e feathers at the edge ot' the wagon-box, asshown at h.

Itwill be understood that in whichever form my invention is enployed theseveral runner IOD patterus are hinged so as to Swing freely away fromthe pattern against which their free ends beayand be withdrawn with thepatte'r to which they are hinged or connected. I also prefer to enployas the hinging device What might be terned a ball-and-socket joint, asmore clearly shown in Fig. 5, the lower end of the runner-pattern havingforned thereon a ball 'L', which is seated in a socket k, of like formin the pattern to which it is hinged, so that the runner-pattern mayhave 'free opportunity to Swing, while the en trance of the sand intothe socket or seat of the hinge is pre- Vented. When such Constructionis employed with the runnenpatterns or connected to the gate-pattern,thetwo patterns may each have a seni-spherical base, so that when placedtogether the two will forn a sphere or ball l to be seated in theball-like socket k, and When the runner-patterns are withdrawn the twoarnswill swng past each other and into line with the n'ate-pattern andbe withdrawn therewit-h. XVhere the runner-patterns are t'ormed as partsof the wings of the pattern, as shown in Fig. 3, in order to prevent theentrance of sand into the pattern it is only necessary that when saidpatterns are projected through the patterns, as shown in the drawings,the bodies thereot' shall fill the Slots or openings in the patternthrough which they pass.

In the use of my invention the operator places the flask over thepatterns, so that it 'ests upon the pattern-plate, and then draws overthe free ends ot' the runner-patterns, so that they form the connectionbetween the main patterns and the gatepattern. He then proeeeds to fornhis nold in the ordinary way, it being preferred, of course, to form thesame by j ari-ing and the bodies of the runnerpatterns being oval inshape, so as to pernit the packing of the sand below them. As soon asthe mold is properly compacted,he proceeds to lower the patternstherefron, either droppin g then from the mold or withdrawing theni inany suitable way, and as the patterns are withdrawn fron the mold therunner-patterns will of course be drawn out With the patterns to whichthey are connected, and will by the body of the sand coinpacted withinthe nold be drawn in line with such patterns, so that they will passinto the oavity forned by the main pattern or by the :rate-pattern andpass out of the nold therewith, it not being necessary for the operatorto pay any attention to them. I am thus enabled to form theconnectingrunner between the two patterns, such as the gate and mainpattern, in a simple and automatic way, and when the cores M are placedwithin the nolds they will close the lower or smaller ends of thenold-cavities, suitable runners being formed either in the cores or inthe nold-cavities to permit the metal to flow from below the cores Malong the scles thereof, as at moi-through the cores into themold-cavities, which will be filled by pouring the metal down throughthe gate 13, thence through the runners 7', t'orned by the hinge-runnerpatterns, and thenee along the cores into the mold-cavties s.

The operation is practically the same in the nold shown in Fig. 3, theonly difference being that as the pattern is withdrawn from said nioldthe runner-patterns will swingback into the main patterns, so leavingthe feather-cavities fOl'IllGd thereby and the runners connecting thegate and mold, and after the main patterns are withdrawn thegate-pattern can be withdrawn froni the otherend of the nold.

W`hat I clain as 'my invention, and desire' to secure by Letters Patent,is

l. In patterns for forning castings, the conbination of two patternsanda runnerhinged to one pattern and extending to the other pattern andadapted to swing on its linge and be withdrawn from the nold with thepattern to which it is connected, substantially as and for the purposesset forth.

2. In patterns i'orforming castings, the con bination of a series ofmain patterns, a gatepattern, and a series of rumer-patterns hin ge d tothe main patterns and extending over to the gate-pattern and seatedagainst it, said runner-patterns being adapted to swing on their hingesand be withdrawn from the noldcavities with the main patterns,substantially as and for the purposes set forth.

3. In patterns for forining tubulaxcastings, the combnation of twopatterns and a runner-pattern hinged to one pattern by a balland-socketjoint and extending to the other pattern, substantially as and for thepurposes set forth.

In testinony whereof I, the said STEPHEN J ARVIS ADAMS, have hereuntoset my hand.

STEPIIEN JARVIS ADAMS.

XV i tnesscs:

JAMES I. KAY, J'. N. CooKE.

IOO

